Flatworms

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Information about Flatworms

Published on May 22, 2008

Author: slidario

Source: slideshare.net

Cucs plans

 

 

 

Els cucs plans són animals aplanats dorso-ventralment com una cinta. Presenten simetria bilateral i tenen un cervell. 2 Es coneixen unes 25.000 espècies.

La majoria són hermafrodites que habiten: ambients marins, fluvials, terrestres humits.

ambients marins,

fluvials,

terrestres humits.

Moltes de les espècies més difoses són paràsits que necessiten diversos hostes, uns per a l'estat larvari i altres per a l'estat adult.

 

2

 

ectoderma endoderma mesoderma tub digestiu sistema nerviós muscles No tenen aparell respiratori, ni circulatori. 3

 

4 i 5

Nemertea, l’animal més senzill amb un sistema digestiu complert.

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